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W5021-T
Kubota W5021-T User Manual
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5.1
ENGINE
WS019WS021
WSM,10481
l
B048F013
Cam
Heights
of
Intake
and
Exhaust
1.
Measure
the
height
of
the
cam
at
its
highest
point
with
an
outside
micrometer.
2.
If
the
measurement
is
less
than
the
allowable
limit,
replace
the
camshaft.
Cam
heights
of
intake
and
exhaust
Factory
spec.
27.335
to
27.365
mm
1.07618
to
1.07736
in.
Allowable
27.15mm
limit
1.0689
in.
Decompression
Pin
Lift
1.
Measure
the
decompression
pin
lift
(L).
2.
If
the
measurement
is
not
within
the
factory
specifications,
replace
the
decompression
pin.
Decompression
pin
Factory
0.52toO.92mm
lift
(L)
spec.
0.0205
to
0.0362
tn.
S-89
119
121
Table of Contents
English
1
Table of Contents
1
Specifications
4
Dimensions
16
Mechanism
17
Engine
18
Automatic Pressure Relieving Mechanism
18
Carburetor
20
Sub Pto Shaft (Except -P, -Pc, -Pcc)
20
Transmission (Except-P,-Pc,-Pcc)
22
Power Train
22
1St Speed
24
2Nd Speed
24
Mower Blade Clutch (Except-P,-T)
26
Braking
26
Mowing
28
Wiring Diagram
30
Disassembling and Servicing
31
Identification
32
General Safety
32
General Precaution
34
Lubricants and Fuel
34
Troubleshooting
36
Servicing Specifications
42
Tightening Torques for General Use Screws, Bolts and Nuts
55
Maintenance Check List
58
Check and Maintenance
60
Check Points of each Use or Daily
60
Checking Fuel Level
60
Checking Engine Oil Level
60
Checking Air Cleaner Element
62
Retightening Blade Mounting Screw
62
Check Points of First Month or Initial 20 Hours
64
Checking Mower Blade
64
Changing Engine Oil
64
Check Points of Every 3 Months or 50 Hours
66
Check Points of Every 6 Months or 100 Hours
66
Cleaning and Readjusting Spark Plug
66
Cleaning Fuel Filter
66
Adjusting Throttle Lever
68
Adjusting Mower Blade Clutch Lever (Except -P, -T)
70
Adjusting Drive Clutch Lever (Except -P, -PC,)
70
Check Points of Every Year or 300 Hours
72
Cleaning Fuel Tank
72
Replacing Fuel Pipe
72
Special Tools
74
Valve Guide Replacing Tool
76
Separating Engine
78
Disassembling and Assembling
78
Draining Engine
78
Battery and Wiring Harness (-SCE,· TCE)
78
Joint
80
Blade and Turbofan
80
Engine Body
82
External Components
82
Valve Clearance
82
Checking and Adjusting
82
Disassembling and Assembling
82
MOWER BLADE CLUTCH (EXCEPT .P, .T
82
French
83
Moteur
83
Bonnet, Air Cleaner and Muffler
84
Fuel Tank
84
Carburateur
85
Moteur
85
Carburetor and Governor Lever
86
Speed Control Plate
88
Ignition Unit and Spark Plug
88
Rotor
88
Cylinder Head and Valves
90
Breather
90
Cylinder Head Cover, Rocker Arm and Push Rod
90
Cylinder Head
90
Culasse Et Soupapes
91
Valves
92
Crankcase Cover
92
Governor Gear, Oil Splashing Gear and Sub PTO Shaft
94
Camshaft and Tappet
94
Connecting Rod Cap
96
Piston and Connecting Rod
98
Piston Ring and Piston Pin
100
Crankshaft and Governor Lever Shaft
100
Servicing
102
Clearance between Valve Stem and Valve Guide
102
Entretien
103
Replacing Valve Guide
104
Valve Seat Width
104
Correcting Procedure for Valve Seat
106
Valve Spring Free Length
106
Cylinder Liner
108
Chemise de Cylindre
109
Correcting Cylinder Liner
110
Piston Skirt
110
Piston Et Segment
111
Piston Pin Hole I.D.
112
Piston Pin O.D.
112
Piston Ring Thickness
112
Clearance between Piston Ring and Ring Groove
114
Piston Ring Gap
114
Connecting Rod Small End I.D.
114
Bielle, Vilebrequin Et Arbre Cames
115
Oil Clearance between Crank Pin and Connecting Rod Big End
116
Correcting Crank Pin
118
Side Clearance of Connecting Rod on Crank Pin
118
Side Clearance of Crankshaft
118
Cam Heights of Intake and Exhaust
120
Decompression Pin Lift
120
Fuel System
122
Governor
122
Adjusting Governor and Maximum No-Load Speed
122
Adjusting Choke Rod
122
Verification Et Reglage
123
Regulateur
123
Tige de Starter
123
Float Chamber, Main Jet and Main Nozzle
124
Ring, Float and Needle Valve
124
Ignition System
126
Spark Plug
126
Ignition Unit
126
Clearance between Ignition Unit Core and Rotor Magnet
126
Bougie D'allumage
127
Bloc de Commande D'allumage
127
Stop Switch
128
Coil Test (Simplified Test with Ohmmeter)
128
Switch Continuity (Except -SCE, -TCE)
128
Starting System
130
Starting Switch
130
Starter Relay
130
Systeme de Demarrage
131
Verification
131
Starter Test
132
Starter
132
Brush Wear
132
Commutator Wear
134
Resistance between Commutator and Armature Shaft
134
Charging Coil
134
Rectifier
134
Verification
135
Mower Blade Clutch and Blade
136
Blade End Play
136
Embrayage de la Lame Et Lame
137
Clearance between Blade and Cutter Housing
138
Cutting Height
138
Clearance between Actuator B and Blade Holder
140
Blade Holder Lining Wear
140
Clutch Spring Free Length
140
Separating Transmission
142
Drive Clutch Cable, Swing Link and Joint
142
Demontage Et Remontage
143
Separation de la
143
Safety Shield, Safety Shield 2 and Change Lever
144
Clutch Arm and Transmission Case
144
Counter Shaft, Final Shaft, Bevel Pinion and Clutch Fork
146
Clearance between Bevel Pinion and Transmission Case (RH) Hole
146
Entretien
147
Clearance between Counter Shaft and Bevel Gear
148
Clearance between Bevel Gear and Ball Retainer
148
Clearance between Shift Rod and Counter Shaft
148
Clearance between Final Shaft and Bushing
150
Clearance between Counter Shaft and Bushing
150
Front Wheel and Rear Wheel
152
Handle and Discharge Guard
160
Checking and Adjusting
160
4
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Kubota W5021-T Specifications
General
Brand
Kubota
Model
W5021-T
Category
Lawn Mower
Language
English
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